Plague Doctor

Plague Doctors are artificers specialized in the creation, use, analysis, and treatment of poisons and diseases. Though they are trained with treatment, their forte is actually the use and the treatment that they offer is usually for the purposes of learning more rather than out of the goodness of their heart or love of money. Plague Doctors are typically not actual doctors or trained physicians, but those that deal with and experience poisons and diseases first hand.

Tool Proficiency

When you adopt this specialization at 3rd level, you gain proficiency with poisoner's kit.

Plague Doctor Spells

Starting at 3rd level, you always have certain spells prepared after you reach particular levels in this class, as shown in the Plague Doctor Spells table. These spells count as artificer spells for you, but they don’t count against the number of artificer spells you prepare.

Plague Doctor Spells

Artificer Level	Spell
3rd	detect poison and disease, hunter's mark
5th	gentle repose, ray of enfeeblement
9th	stinking cloud, speak with dead
13th	blight, giant insect
17th	contagion, insect plague

You also learn the spare the dying cantrip.

Toxic Edge

Beginning at 3rd level, you can coat a blade with potent magical toxins. As a bonus action, you can coat a single melee weapon, that deals piercing or slashing damage and that you are holding, with Acidic, Poisonous, or Necrotic Toxins. That weapon deals an additional 1d8 damage when it hits, and all damage it deals is considered magical for the purposes of overcoming resistances and immunities. The damage type of the additional damage is either acid (Acidic Toxin), poison (Poisonous Toxin), or necrotic (Necrotic Toxin). You can end this effect at any time you choose. You can only have one weapon coated with any of these toxins at a time, if the weapon leaves your hands at anytime the effect immediately ends. You must use another bonus action to either recoat or change the type of toxin.

At 9th level, this additional damage increases to 2d8. At 15th level, this additional damage increases to 3d8.

Resilient Antibodies

At 5th level, your time around some of the worst poisons and diseases has caused you to develop a resistance to them. You have advantage on all saving throws against any poison or disease. You also have resistance to poison damage.

Overcoming Envenomation

By 9th level, your poisons are so strong that they are able to overcome resistances and immunities. When you would deal poison damage to a creature that has resistance to poison damage you ignore it and deal full poison damage to that target. When you would deal poison damage to a creature that has immunity to poison damage, you treat them as if they have resistance to poison damage and deal half poison damage to that target instead of no damage.

You can't use this feature against a creature that is a construct, elemental, or undead, nor can you use this feature against an object or structure. This feature only works with spells you cast from your spell list, your features, or items that you craft.

Recursive Poison

Starting at 15th level, whenever you use a spell, feature, or item that deals poison damage or causes the poisoned condition to any creatures, you can force all creatures affected by that effect to make a Constitution saving throw against your artificer spell save DC. If any creature fails, and that effect doesn't already cause that creature to become poisoned, they become poisoned for their next 3 turns. Additionally, as long as that creature is poisoned due to either that effect, or this feature, they take 1d4 poison damage at the beginning of each of their turns.

This feature only works with spells you cast from your spell list, your features, or items that you craft. You can activate this feature 3 times. You regain all uses after taking a short rest.